MallocGrowableArray

runtime/vm/zone.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ZONE_H_
 #define VM_ZONE_H_
 
 #include "platform/utils.h"
 #include "vm/allocation.h"
 #include "vm/handles.h"
@@ skipping 94 matching lines @@
   uword AllocateLargeSegment(intptr_t size);
 
   // Insert zone into zone chain, after current_zone.
   void Link(Zone* current_zone) {
     previous_ = current_zone;
   }
 
   // Delete all objects and free all memory allocated in the zone.
   void DeleteAll();
 
+  // Does not actually free any memory. Enables templated containers like
+  // BaseGrowableArray to use different allocators.
+  template <class ElementType>
+  void Free(ElementType* old_array, intptr_t len) {
+#ifdef DEBUG
+    memset(old_array, kZapUninitializedByte, len * sizeof(ElementType));
+#endif
+  }
+
 #if defined(DEBUG)
   // Dump the current allocated sizes in the zone object.
   void DumpZoneSizes();
 #endif
 
   // This buffer is used for allocation before any segments.
   // This would act as the initial stack allocated chunk so that we don't
   // end up calling malloc/free on zone scopes that allocate less than
   // kChunkSize
   uint8_t buffer_[kInitialChunkSize];
@@ skipping 17 matching lines @@
   Segment* large_segments_;
 
   // Structure for managing handles allocation.
   VMHandles handles_;
 
   // Used for chaining zones in order to allow unwinding of stacks.
   Zone* previous_;
 
   friend class StackZone;
   friend class ApiZone;
-  template<typename T, typename B> friend class BaseGrowableArray;
+  template<typename T, typename B, typename Allocator>
+  friend class BaseGrowableArray;
   DISALLOW_COPY_AND_ASSIGN(Zone);
 };
 
 
 class StackZone : public StackResource {
  public:
   // Create an empty zone and set is at the current zone for the Isolate.
   explicit StackZone(Isolate* isolate)
     : StackResource(isolate),
       zone_() {
@@ skipping 82 matching lines @@
             reinterpret_cast<void*>(old_data),
             Utils::Minimum(old_len * sizeof(ElementType),
                            new_len * sizeof(ElementType)));
   }
   return new_data;
 }
 
 }  // namespace dart
 
 #endif  // VM_ZONE_H_